Molecular evolution of dengue viruses: contributions of phylogenetics to understanding the history and epidemiology of the preeminent arboviral disease.

Molecular evolution of dengue viruses: contributions of phylogenetics to understanding the history and epidemiology of the preeminent arboviral disease.
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DOI:
10.1016/j.meegid.2009.02.003
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发表时间:
2009-07
期刊:
Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases
影响因子:
--
通讯作者:
Vasilakis N
Vasilakis N
中科院分区:
其他
文献类型:
--
作者:
Weaver SC;Vasilakis N

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登革病毒(DENV)是世界上热带和亚热带地区最重要的虫媒病毒病原体,使全球近三分之一的人口面临感染风险。来自历史记录的证据表明,这些病毒与人类之间存在着长期的联系。DENV的传播包括非人类灵长类动物和伊蚊属树栖蚊子之间的分异地方性循环,以及埃及伊蚊和人类水库宿主之间的城市地方性/流行病循环。埃及伊蚊是一种在周围水域发育幼虫的蚊子。DENV是黄病毒科黄病毒属的成员,由4个抗原性不同的血清型(DENV-1-4)组成。虽然它们在流行病学上几乎相同,但这4种DENV血清型在基因上是相当不同的。基于部分和/或完整基因组序列的系统发育分析已经阐明了自然界中DENV的起源、流行病学(遗传多样性、传播动力学和流行潜力)以及塑造DENV分子进化的力量(进化速度、选择压力、种群大小、假定的重组和进化制约)。在这篇综述中,我们考察了系统发育如何提高了对DENV感染和传播不同阶段的种群动态和大小的理解,以及这些信息如何影响发病机制,并提高了我们理解和预测DENV出现的能力。
Dengue viruses (DENV) are the most important arboviral pathogens in tropical and subtropical regions throughout the world, putting at risk of infection nearly a third of the global human population. Evidence from the historical record suggests a long association between these viruses and humans. The transmission of DENV includes a sylvatic, enzootic cycle between nonhuman primates and arboreal mosquitoes of the genus Aedes, and an urban, endemic/epidemic cycle between Aedes aegypti, a mosquito with larval development in peridomestic water containers, and human reservoir hosts. DENV are members of the genus Flavivirus in the Family Flaviviridae and comprise of 4 antigenically distinct serotypes (DENV-1-4). Although they are nearly identical epidemiologically, the 4 DENV serotypes are genetically quite distinct. Utilization of phylogenetic analyses based on partial and/or complete genomic sequences has elucidated the origins, epidemiology (genetic diversity, transmission dynamics and epidemic potential), and the forces that shape DENV molecular evolution (rates of evolution, selection pressures, population sizes, putative recombination and evolutionary constraints) in nature. In this review, we examine how phylogenetics have improved understanding of DENV population dynamics and sizes at various stages of infection and transmission, and how this information may influence pathogenesis and improve our ability to understand and predict DENV emergence.
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